[SI-LIST] Re: Film resistor thickness discussion
- From: Tesla <emcesd@xxxxxxx>
- To: lgreen22@xxxxxxxxxxxxxx
- Date: Thu, 30 Aug 2012 16:26:14 +0800 (CST)
Hi, Lynne
Thanks a lot for your efforts. it help me a lot.
Regards.
Tesla
At 2012-08-30 01:39:26,"Lynne C. Green" <lgreen22@xxxxxxxxxxxxxx> wrote:
>Hello, Tesla,
>
>THICK film resistors are much thicker than THIN film resistors. Usually,
>there is only one thickness of each on a substrate. Thick film can be
>made with a screen-print process (material added to substrate), while
>thin film is done with a coating that is then etched (material removed
>from substrate).
>
>Resistance is controlled by resistor length, width AND thickness. Also
>layout (corners). For both thin and thick films, materials and
>thickness are already optimized, so a design engineer controls
>resistance by layout.
>
>Hope this helps with your questions.
>
>Regards,
>Lynne
>
>
>"IBIS training when you need it, where you need it."
>
>Dr. Lynne Green
>Green Streak Programs
>http://www.greenstreakprograms.com
>425-788-0412
>lgreen22@xxxxxxxxxxxxxx
>
>
>On 8/29/2012 4:13 AM, Tesla wrote:
>> Hi, All
>>
>> When searching documents about the SMD resistor, a question was raised by
>> myself. For the thick film and thin film resistor in the same package,eg
>> 0603, how do we control the value of the resistor?
>> 1:thickness of the film
>> 2:Keep the thickness same, make a lot of different shapes to the film.
>>
>> Thanks.
>> Tesla
>>
>
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